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A child class B of an abstract class A must define the abstract methods of A.
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11
Overrided method visibility must be the same or less restrictive than the inherited method.6
Can a class implements several interfaces ?9
Inheritance in OOP.3
What does the following code return ?2
Which modification of the following code WILL NOT make the output be "success" ?4
When can you do a+b in OOP ?3
Explain the difference between overriding and overloading in OOP.